Hydraulic pump and motor door operating mechanism



Dec. 25, 1951 HENRY D KAUFMAN 2,579,742

NOW BY JUDICIAL CHANGE OF NAME HENRY KAUFMAN DE LANCEY HYDRAULIC PUMP AND MOTOR DOOR OPERATING MECHANISM Filed Sept. 23, v1948 5 Sheets-Sheet l IN VEN TOR: fism'r Mum 141v. 05 LAM/05y 'wfwfl Dec. 25, 1951 Filed Sept. 23, 1948 HENRY D KAUFMAN NOW BY JUDICIAL CHANGE OF NAME HENRY KAUFMAN DE LANCEY HYDRAULIC PUMP AND MOTOR DOOR OPERATING MECHANISM 5 Sheets-Sheet 2 I N VEN TOR.

Dec. 25, 1951 HENRY D KAUFMAN 7 2,579,742

' NOW BY JUDICIAL CHANGE OF NAME HENRY KAUFMAN DE LANCEY HYDRAULIC PUMP AND MOTOR DOOR OPERATING MECHANISM Filed Sept; 23, 1948 3 Sheets-Sheet 3 INVENTOR:

fizm Maxim 050m BY l I WIDE/YE) Patented Dec. 25, 1951 HYDRAULIC PUMP AND MOTOR DOOR OPERATING MECHANISM Henry D. Kaufman, Los Angeles, Calif.; now by judicial change of name Henry Kaufman De Lancey.

Application September 23, 1948, Serial No. 50,707

9 Claims.

The present invention relates to improvements in door operating mechanisms and particularly to an electrically actuated, fluid pressure operated mechanism.

It is the general object of my invention to provide a simple and inexpensive devi e which may be installed in a building equipped with a conventional light circuit. It is a further object to provide a self -contained operating mechanism which may be mounted in a convenient position within the building and made operativeby merely seating a plug thereof in a light socket or wall receptacle of the light circuit. Another object is to provide a mechanism which may be actuated from any convenient point without or within the building. A still further object is to provide a door operating mechanism which, while effective automatically to operate a door, will not interfere with manual operation thereof.

Drawings are hereto appended, in which a preferred form of the invention is illustrated and, each of the above named objects, together with the many advantageous features of the invention, are fully set forth in the following detailed description.

In the drawings:

Fig. 1 illustrates, diagrammatically, the connections from a door to the control mechanism of the invention;

Fig. 2 is a side elevational view on a larger scale of the control mechanism with the casing thereof broken away for the sake of clearness; and

Figs. 3 to 6, inclusive, are diagrammatic views showing diiferent positions taken by the control mechanism during the operation of the door.

The control mechanism is, in Fig. 2, shown in its closed door position. The mechanism is enclosed within a casing l, which is placed above a tank 2 forming a reservoir for the fluid employed to operate the door. A valve 3 is mounted within this tank in close proximity to a pump 6, and a conduit 5 extends from the pump to a central space 6 within the valve. A piston rod 7 extends into the valve and it is shown fitted with pistons 8, 9 which are properly spaced apart on the rod to open passages for the fluid from the pump to conduits I0, I l inthe manner and for the purpose which will now be described.

Within the casing [is hung a lever I 5, on a centrally positioned pivot It, and the ends of this lever are fitted to receive links l1, Hi, the upper ends of which are hung in cores l9, 2!; of a pair of solenoid magnets 2 i, 22. It is also noticed that the piston rod 1, through the medium of a link 23, i pivotally connected with the lever at a point 24, a distance from the center thereof.

A normally closed spring actuated switch 25 of any preferred commercially well known construction, is mounted for oscillating movement on a centrally positioned pivot 25 of the casing and it is at the lower end thereof fitted with a contact button 21 in close proximity to the end of the lever I5 as indicated in Fig. 2 of the drawings. This switch is operable by the lever, together with other means which Will be described presently, to control a circuit from a source of energy 35 through a motor at which, in turn, is connected to operate the pump 4. A step-down transformer 28 is cut into this circuit and conductors extend from the low pressure side thereof to the magnets 2|, 22. A switch 29 is out into this magnet circuit to control the flow through one magnet or the other. i

In the dormant position illustrated in Fig. 2 the switch button 21 is held depressed against the end of the lever i5 to maintain the motor circuit open. It becomes necessary inorder to initiate door opening movement to throw the switch 29 to close the circuit through the magnet 2 i thereby to energize this magnet to oscillate the lever [5 on its pivot and so to adjust the valve 3 to open the passage for the operating fluid from the pump through the conduit Ill, during which movement the end of the lever l5 rises above the button 21, thereby releasing the button of the switch 25 for circuit closing movement to energize the motor it This position is indicated in Fig. 3. The motor now commences to operate the pump, thereby to initiate door opening movement, but the circuit through themagnet becomes reopened the moment the switch 29 is released. While in the drawings for the sake of simplicity the switch 29 is merely diagrammatically outlined, it is to be understood that any commercially well known type of pushbutton or other kind of spring-held switch construction may be employed.

The control mechanism of my invention may be adapted tocontrol the movement of any type of door or gate and it is for illustration in Fig. 1 shown connected to operate an overhead swinging door 3B which is hung on a pivot 3| in the manner such doors are ordinarily hung; there being a similar pivotal support at each side edge of the door. A cylinder 32 is at the rear end thereof shown fitted with a lug which rides on a pivot 33 thereby to aiiord the cylinder such freedom of oscillating movement in a vertical plane as required for door opening and closing operations. A piston rod 37 extends from the door panel to a piston 36 within the cylinder and the aforenamed conduits H], H lead from the valve 3 to the front and rear ends thereof. Movement of the piston within the cylinder is effective to swing the door on its pivots.

Referring further to Fig. 1, it is noticed that a tubular member 40 is held supported for axial sliding movement within brackets 4|, 42, 43 of the cylinder 32. A piston 44 is slidable within this member and it is fitted with a rod 45 which extends through and is guided within a bracket 46 of the piston rod 31. Collars 41, 48 are adjustably mounted at the end of the rod 45 in position to straddle the bracket 46 and they are so related to this bracket that, in the closed door position, the latter engages the collar 48 to maintain the tubular member 45 in the pos tion indicated in Fig. 1.

It is to be noted that a fixed collar 49 is secured to the member 40 and that it takes a position intermediate the brackets 42 and 43; also that springs 56 and 5! are placed on the member on each side of the collar 49. One end of these springs are anchored on this collar and the other ends of the springs extend through the brackets 42, 43 and terminate in eyelets or heads 56*, 5P

The function of the springs is to urge the collar 49 into central position between the two brackets, during which movement the tubular member is moved axially therewith. It is found that the spring 50 which, as indicated in Fig. 1, has been held extended by its head 50 against the bracket 43 while the door remained in closed position, becomes liberated the moment the piston rod 31 commences to move to open the door for contracting movement to return the collar to its central position and at the same time to move the tubular member 40 in the same direction.

It was above stated that. the motor switch is supported for oscillating movement on a pivot 26 and this method of suspension is found necessary in order to effect proper control of the motor circuit. In connection therewith it is to be noted that an arm 55 is hung for oscillating movement on a pivot 56, in close proximity to a post 51 which rises from the top of the motor switch. Adjustable stops 58, 59 are mounted in this post in position for registration with beveled inner surfaces 60, 6| of the arm 55 and the position of these stops is so that, when the arm is swung on its pivotin one direction or the other, one of the surfaces 60, 6!, contacts the stop adjacent thereto to swing the motor switch in counter-clockwise direction. A connecting element in the form of a resilient wire 62 extends from the outer end of the arm 55 through a guide 63 to a collar 64 of the tubular member 40. When this collar is correctly placed and rigidly secured to the tubular member, it is found that the axial movement of the member, due to the expansion of the spring 5| at the beginning of the door opening movement, will cause the wire 62 to advance through the tubular guide 63 thereby to force the end of the arm 55 downward. During this movement it is found that the inner surface 66 of the latter is caused to recede from the stop 58 and so to permit the motor switch 25 to return in and further to move the resilient wire'62 r the arm 55 downward into the position indicated in Fig. 5. The surface 6| of the arm is at the same time advanced against the stop 59 again to tilt the motor switch in counter-clockwise direction.

These movements of the arm and motor switch during the opening movement of the door are in themselves insuflicient to control the motor circuit unless and until the position of the lever I5 is correspondingly adjusted. This may be accomplished in the following manner. A bar 65 is held for vertical sliding movement within guides 66, 61 and it is at the top thereof operatively connected with the arm 55, as by a projection 68 of the bar riding in a slot 69 of the arm. The bar is intermediate its length shown recessed and the ends I0, H of this recess hold definite relations to the curved shoulders 12, 73 of a plate 64 which is transversely secured to the lever l5 and which extend symmetrically in both directions therefrom.

While the door remains closed and the arm is held in the fully elevated position of Fig. 2, it is noticed that the curved shoulder i3 rides on the edge of the bar 65. Also that the plate 64 is caused to tilt to bring the shoulder 72 thereof toward the bottom end H of the bar recess when the magnet 21 is energized to swing the lever l5 as above described and as illustrated in Fig. 3. When the door now commences to open and the spring 50, through the tubular member 40, forces the arm 55 into the neutral position of Fig. 4, it is noticed that the shoulder "I2 takes a position adjacent the recess end 16. It remains in this position until, at the end of the door opening movement, the arm 55 moves into the fully depressed position of Fig. 5, during which movement the bar 65 forces the lever I5 into the position indicated in this view of the drawings. The end of the lever is at the same time lowered into engagement with the contact button 21 and, as the motor switch still by the face Bl of the arm 55 is held tilted counter-clockwise, it is seen that the button by the end of the lever is caused to recede into the switch during this final lever movement, thereby to open the motor circuit.

Since the function of the control mechanism is not only to govern the action of the pump but also ,to' adjust the valve as required'for door operation, it is important to note the positions taken by the valve during the door opening and closing movements. In the closed door position of Fig. 2, it is noticed that the passage from the pump to the conduit 10 is closed, but the passage from the conduit ll remains slightly open in order to permit any excess fluid from the cylinder to discharge through a port 55 into the tank. When the magnet 2| is energized, it is seen that the valve is moved into the position of Fig. 3 fully to open the passage through the conduit l0 and that the exhaust passage 15 from the conduit ll becomes opened. This position is maintained until, at the end of the door opening movement, the lever I5 is swung to raise the valve into the position of Fig. 5, causing the piston 8 thereof gradually to approach and to reach closing position of conduit H. But the passage to the pump from the conduit It remains slightly open. The door having reached fully open position, it becomes necessary to press the button of the switch 29 to energize the magnet 22 when it is desired again to close the door. In doing this, the lever l5 reaches its opposite extreme position, as indicated in Fig.

gamma 6, fully to open passage through the conduit H but leaving passage open from the conduit into the tank.

From this description it is seen that, while pressure flow from the pump through either one of the conduits to move the door is out oii at the end of each door movement, return flow through the other conduit remains slightly open. This is done partly in order to permit the door gently to come to a .stop and also so as to make it possible manually to move the door in the opposite direction in case of power failure. In this connection it is pointed out that, when the pistons 8, 9 are rather loosely fitted, the

door movement will be much more gentle and manual operation will be facilitated. are important features of my invention.

The recessing iof the bar 65, asabove described and the relation of the bar recess to the shoul- These ders of the lever plate 64 areillustrative of means for returning the lever I5 to switch opening. position at the beginning of each door movement and for leaving the bar free for additional movement in the same direction at the end of the door movement. It is furthermore important to note that, by such arrangement, reversal of the door movement is made possible. This is because the shoulders 12, 13, during the movement of the lever l5 from its intermediate position of Figs. 2 or 5 to its extreme position of Figs. 3 or 6, are free to pass through the recess of the bar .65.

While in the foregoing I have described the preferred form of the invention illustrated in the drawings, it is obvious that various modifications of the arrangements and structures thereof may be embodied without departing from the spirit of the invention as expressed in the claims hereto appended.

I claim:

1. In a door operating mechanism having a cylinder and a piston connection extending therefrom, a hydraulic mechanism comprising, a valve, conduits from said valve to the ends of said cylinder, two magnets, connections from said magnets to operate said valve to control the passages through said conduits, a pump operatively connected with said valve, a circuit, a motor in said circuit connected to drive said pump, a self-closing switch in the circuit normally held open by said magnet connections and released for said closing movement each time one of the magnets is energized, and means movable with said piston connection for opening said switch at the end of each piston movement.

2. In a door operating mechanism having a cylinder and a piston connection extending therefrom, a valve, conduits from said valve to the ends of said cylinder, a lever, connection from said lever to operate said valve, magnets operatively connected with the ends of said lever to move the valve thereby to control the passages through said conduits, a pump operatively connected with the valve, a circuit, a motor in said circuit connected to drive said pump, a self-closing switch in said circuit normally held open by said lever and. released for closing movement each time a magnet is energized to move the lever and valve to open a passage to one of said conduits, and means movable with said piston connection for returning said lever and valve to their initial positions and subsequently to open the switch.

3. In a door operating mechanism having a cylinder and a piston connection extending Zia) therefrom, a valve, conduits from said valve to the ends of said cylinder, a lever, connections from said lever to operate said valve, magnets operatively connected with the ends of said lever to move the valve thereby to control the passages through said conduits, a pump operatively connected with the valve, a circuit, a motor in said circuit connected to drive said pump, a pivotally hung self-closing switch in said circuit normally held open by said lever and released for closing movement each time :a magnet is energized to :move the lever and valve to open a passage to one. of said conduits, and means movable with said piston connection .for returning said lever and valve to their initial positions and subsequently to move the switch on its pivot against the lever thereby to open the switch.

4. In a door operating :mechanism having a cylinder and a piston connection extending therefrom, a hydraulic mechanism comprising, a valve, conduits from :said valve to the ends of said cylinder, two magnets, connections from said magnets to operate said valve to control the passages through said conduits, a pump operatively connected with said valve, a circuit, a motor in said circuit connected to drive :said pump, a self-closing switch in the circuit normally held open by said magnet connections and released for closing movement each time a magnet is energized, elements movable by said piston connection at the end of each piston stroke to open said switch, and means for returning said elements to their normal position at the beginning of the next following piston stroke.

5. In a door operating mechanism having a cylinder and a piston connection extending therefrom, a valve, conduits "from said valve to the ends of said cylinder, a lover, a connection 1' from said lever to operate said valve, magnets operatively connected with the ends of the lever to move the lever and valve thereby to control the passages through said conduits, a pump operatively connected with the valve, a circuit,

- a motor in said circuit connected to drive said pump, a pivotally mounted self-closing switch in said circuit normally held open by the end of said lever and released for closing movement each time a magnet is energized to move the lever away from the switch and to move the valve to open a passage to one of said conduits, elements movable with said piston connection for returning said lever and valve to their initial positions and to bring the end of the lever into contact with the switch, continued movement of said elements causing the switch to swing on its pivot toward the end of the lever thereby to open the switch.

6. In a door operating mechanism having a cylinder and a piston connection extending therefrom, a valve, conduits from said valve to the ends of said cylinder, a lever, a connection from said lever to said valve, magnets operatively connected with the ends of the lever to move the lever and valve thereby to control the passages through said conduits, a pump operatively connected with the valve, a circuit, a motor in said circuit connected to drive said pump, a pivotally hung self-closing switch in said circuit normally held open against the end of said lever and released for closing movement each time a magnet is energized to move the end of the lever away from the switch and to move the valve to open a passage to one of said conduits, means movable with said piston connection for returning said lever to its position in contact with the switch and to move the valve to its initial position of closing .the previously opened passage to the cylinder, continued movement of said means causing the switch to tilt on its pivot against the end of the lever thereby to open the switch.

7. In a door operatingmechanism including acylinder and a piston within said cylinder adapted to be connected to a door; a control mechanism comprising, a valve, conduits from said valve to the ends of the cylinder,.a pump for forcing pressure fluid through said valve and conduits to the cylinder, a circuit, two magnetsin the circuit, a starting switch in the circuitmanually operable to close the circuit through one of said magnets, elements movable by the magnets to adjust the valve to control-the flow of pressure fluid tosaid conduits, a motor circuit shunted into said magnet circuit, a selfclosing switch in said motor circuit and maintained open by said elements, movement of the latter to adjust the valve releasing said motor switch for movement to close the motor circuit, and means movable by said piston for returning the elements to motor switch opening position. r

8. In a door operating mechanism including a cylinder and a piston within said cylinder adapted to be connected to a door; a control mechanism comprising, a valve, conduits from said valve to the ends of the cylinder, a lever connected to operate saidvalve, a pump for forcing pressure fluid through the valve and conduits to the cylinder, a circuit, two magnets in said circuit, links interconnecting said magnets with the ends of said lever, a starting switch in the circuit manually operable to close the circuit through one of said magnets, a motor circuit shunted into the magnet circuit, a selfclosing switch in the motor circuit and maintained open by one end of said lever, movement of the lever to adjust the valve releasing said motor circuit switch for movement to close the motor circuit, and means movable by said piston for returning the lever to motor switch opening position.

9. In a door operating mechanism including a cylinder and a piston within said cylinder adapted to be connected to a door; a control mechanism comprising, a valve, conduits from said valve to the ends of the cylinder, a lever connected to operate said valve, a pump for forcing pressure fluid through the valve and conduits to the cylinder, a circuit, two magnets in said circuit, links interconnecting said magnets with the ends of said lever, a starting switch in the circuit manually operable to close the circuit through one of said magnets, a motor circuit shunted into said magnet circuit, a pivotally hung self-closing switch in the motor circuit and maintained open by one end of said lever, movement of the lever to adjust the valve releasing said motor switch for movement to close the motor circuit, and means movable by said piston for efifecting return movement of the lever and subsequently to move the motor switch on its pivot against the end of the lever to reopen said switch.

HENRY D. KAUFMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,358,859 Leach Nov. 16, 1920 1,948,951 Walker Feb. 27, 1934 2,120,495 Harris June 14, 1938 2,132,325 Soldatti Oct. 4, 1938 2,263,470 Perkins et al. Nov. 18, 1941 2,330,006 Odenthal Sept. 21', 1943 2,440,561 Wilder Apr. 27, 1948 2,460,477 Wallman Feb. 1, 1949 

